Home
Class 12
PHYSICS
A bomb of 12 kg explodes into two parts ...

A bomb of 12 kg explodes into two parts 4 kg and 8 kg. The velocity of 8 kg mass is 6 `ms^(-1)`.The the other is :

A

4.8 J

B

288 J

C

48 J

D

24 J

Text Solution

Verified by Experts

The correct Answer is:
b
Initial momentum= Final momentum.
`12xx0=8xx6+4v`
`implies v=-12 ms^(-1)`
`:. K.E=(1)/(2)4(-12)^(2)=288 J`
Promotional Banner

Topper's Solved these Questions

  • WORK , POWER , ENERGY AND COLLISIONS

    MODERN PUBLICATION|Exercise Multiple Choice Questions (LEVEL-II)|67 Videos

  • WORK , POWER , ENERGY AND COLLISIONS

    MODERN PUBLICATION|Exercise Multiple Choice Questions (LEVEL-III)|5 Videos

  • WAVE OPTICS

    MODERN PUBLICATION|Exercise Recent Competitive Questions|18 Videos

Similar Questions

Explore conceptually related problems

A bomb of mass 9 kg explodes into two pieces of mass 3 kg and 6 kg. The velocity of mass 3 kg is 16 ms^( -1) The K.E. of mass 6 kg is:

A bomb of mass 16 kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity of the 12 kg mass is 4 ms^(-1) . The kinetic energy of the other mass is :

A 12 kg bomb at rest explodes into two piece of 4 kg and 8kg . If the momentum of 4kg piece is 20Ns, the kinetic energy of the 8kg piece I

N kg^(-1) is the unit of:

The de Broglie wavelength of 1 kg mass moving with a velocity of 10 ms^-1 is

A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 ms^(-1) After 5 sec. it explodes into two fragments. One of mass 400 g is found to go down with a speed of 25 ms6(-1) what happens to the second justafter the explosion ?

MODERN PUBLICATION-WORK , POWER , ENERGY AND COLLISIONS-Revision Test
  1. A bomb of 12 kg explodes into two parts 4 kg and 8 kg. The velocity of...

    Text Solution

    |

  2. A ball is dropped from height of Im. If coefficient of restituion betw...

    Text Solution

    |

  3. A metal ball hits a wall and does not rebound, where as  b a rubber ba...

    Text Solution

    |

  4. The velocity of a body of mass 2.5 kg is changed from vecVi =(3hati-4h...

    Text Solution

    |

  5. The value of 1 Mev is equal to :

    Text Solution

    |

  6. A particle is projected vertically upwards with a velocity given by V=...

    Text Solution

    |

  7. A spring of constant 5xx10^(3) N/m is stretched initially by 5 cm from...

    Text Solution

    |

  8. Consider the following two statements. a. Linear momentum of a sys...

    Text Solution

    |

  9. A body of volume V and dinsity p is raised through height h in a liqiu...

    Text Solution

    |

  10. A child is swinging a swing. He is one metre above the ground at the l...

    Text Solution

    |

  11. A canon shell explodes in mid air, its total

    Text Solution

    |

  12. A body at rest may have :

    Text Solution

    |

  13. A car is moving along a straight horizontal road with a speed V. If th...

    Text Solution

    |

  14. If a body of mass m moving with velocity v collides with another body ...

    Text Solution

    |

  15. A ball is projected vertically upward with an initial velocity. Which ...

    Text Solution

    |

  16. A motor with an efficiency of 90% drives a pump, whose efficiency is 6...

    Text Solution

    |

  17. A lorry and a car moving with the same kinetic energy are bought to re...

    Text Solution

    |

  18. The power of motor pump is 2 KW. The water raised by the pump per minu...

    Text Solution

    |

  19. The energy required to accelerate a car from rest to 10 ms^(-1) is W. ...

    Text Solution

    |

  20. A man weighing 60 kg lifts a body of 15 kg to a top of building 10 m h...

    Text Solution

    |

  21. A sphere of mass M moving with velocity w collides elastically with an...

    Text Solution

    |